Rotary air-compressor.



S. J. BVERTS & J. E.. BURRIS-.

ROTARY AIR comrnnsson.

' I APPLICATION PILIQED JUNE 4, 1907. Patented 8 6 SHEETS-BEEF! 1.

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S; J. EVERTS & J; B. lslfiuus. ROTARY AIR COMPRESSOR. APPLICATION FILED JUNE 4', 1967.

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APPLJIOACI'IOZBT FILED JUNE 4, 1907. 905,861. Patented Dec.8,1908.

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S J EVERTS & J E BURRIS ROTARY AIR COMPRESSOR. APPLIOATI FILED JUNE 1907. 905 ,861 Patented Dec. 8,1908. 5 SHEETS-SHEET 4.

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s, J. EVERTS & J. E. BURRIS.

ROTARY AIR COMPRESSOR. nrmourmw nun JUNE 4, 1907.

Patelited Dec.8,1908.

BSHEE'I'S-HHBET UNITED s'rArns PATENT OFFICE.

SMEDLEY J. EVERTS AND JOSEPH E. BURRIS, OF BELT, MONTANA.

ROTARY AIR-COMPRESSOR.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed June 4, 1907. Serial No. 377,130.

To all whom it may concern:

Be it known that we, SMEDLEY J. EVERTS and JosEPI-r E. BURRIS, citizens of the United States, residing at Belt, in the county of Cascade and State of Montana, have invented a new and useful Improvement in Rotary Air-Compressors, of which the following is a specification.

This invention relates to a motor for com pressing air and certain new and novel means for transmitting air from the motor and discharging the same into the air re- CelVBI'.

The invention consists of the novel features of construction hereinafter fully described, pointed out in the claims and shown in the accompanying drawings, in which,

Figure 1 is an end view in elevation of the motor the portion of the air tank being shown in section. Fig. 2 is a vertical section through the motor and parts carried thereby. Fig. 8 is a section on the line 33 of Fig. 2. Fig. 41 is a section on the line 4cl: of Fig. 2. Fig. 5 is a face view of one side of the motor casing. Fig. 6 is a face view of a blade carried by the motor. Fig. 7 is an elevation showing an edge view of a cylinder and showing the blade connected thereto. Fig. 8 is an enlarged view partly in section of an end portion of an air reservoir and a rotary valve for admitting air thereto. Fig. 9 is a section on the line 66 of Fig. 8. Fig. 10 is a plan view of the rotary valve. Fig. 11 is a plan view of a modified form of valve. Fig. 12 is a section on the line 1212 of Fig. 11. Fig 13 is a plan view of another modified construction of the rotary valve. Fig. 14 is a partial section on the line 14 14 of Fig. 13.

In these drawings A represents the casing having a base A. Within the casing and upon one side is a fixed gear ring B. A shaft C is journaled in the hub portion of the casing A and carries a fly wheel C and the inner portion of said shaft is enlarged and bored out to form a sleeve G which sleeve is slotted as shown at C A fixed sleeve D, extends into the hub portion of the casing A from the opposite side and fits within and supports the rotating sleeve O and the sleeve D is slotted as shown at D. The slots of sleeve C are two in number and arranged opposite each other.

Small pinions E, are held loosely in engagement with the gear ring B, said pinions being supported by and turning within crescent-shaped plates Eloosely mounted on the sleeve C and held in place by the casing heads with suflicient lateral movement to allow free play of said plates. These pinions are opposite each other and have inwardly extending, eccentrically mounted pins E which extend within oppositely arranged cylinders F, through longitudinal slots F and within these cylinders F are arranged pistons G open at one end and secured to the inner end. portions of the pins E It will be obvious that as the pinions E travel around the fixed gear ring they will move along the slots F, and will reciprocate the pistons G in the cylinders F, the rotation of the cylinders, as will be hereafter described. regulating travel of the pinions.

The'pistons Gr carry at their inner ends opposite the acting valves G which are provided with springs G to hold the valves to their seats and the springs are held in place by washers G The valve stems are slotted to allow for lifting of the valves as shown at Gr and pins G carried by the cylinders pass through these slots and prevent the dislodgment of the valves.

It will of course be obvious that there are many forms of check valves which can be employed in connection with these pistons. The side of the casing A opposite the pinions E is provided with a number of air inlets H. Upon the casing A is mounted a block J in which is journaled the shaft J provided with pulleys J 2 and J The hollow shaft K, has one end portion held in the sleeve D, and mounted upon this shaft, which is not rotatable, is a rotatable sleeve K, upon which is fixed a pulley J 4 in alineinent with the pulley J The shaft K extends through a suitable threaded plug into an air reservoir L and carries at its inner end a rotary valve L. This rotary valve consists in its details of a cylindrical head for the combination sleeve and shaft K in which works along radial lines of the head two oppositely arranged valves M, having grooved stems M, these valves being of the check valve type.

The periphery of the head is provided with a plurality of obliquely arranged ports M In Figs. 11 and 12, we have shown a slightly modified form in which a valve head N is provided with intersecting discharge slots N. In Figs. 13 and 14 we have shown a modification in which a rotary valve head 0 is provided with one large obliquely extending slot- O formed by cutting away the metal between the slots M shown in the preferred form.

In order to increase the air circulation and keep the motor cool a plate P having oppositely formed blades P, is secured to the casing of the cylinder F and it will also be noted that the cylinder F is cut out as shown at F in order to permit entrance of air thereto.

The operation of the device is as follows Power is applied by means of a belt to the wheel or in any other desired manner to the shaft C, thus rotating the cylinder F and causing the pinions E to travel about the fixed gear B. This reciprocates the piston in the cylinders F and air is drawn in through the openings H and compressed by outward strokes of the pistons, thus causing the valves G to lift from their seats and admitting air into the cylinders F between the pistons and the inner ends of the cylinders F. As the cylinders turn the sleeve C the slots C, register with the slots D and the air is forced into the sleeve D and through the shaft K into the rotary head L. The

sleeve K, which forms a shaft for the pulley J is run by a belt, not shown, from the pulley J 3 to the pulley J and the rapid rotation of the shalt K and the valve head L throws by centrifugal force combined with the pressure of air within the head the valves M outwardly.

' The rapid rotation of the valve head tends to decrease air pressure, upon the discharge outlets M and the air is therefore readily forced into the reservoir L. Upon stoppage of the motor or decrease of its speed below a point where it furnishes a sufficient amount of compressed air to hold the valves M open they seat themselves and prevent loss of air from the reservoir. The blades P, cause a a circulation of air about the cylinders F and keep the same cool.

Having thus fully described our invention what we claim as new and desire to secure by Letters Patent, is

l. The combination with an air reservoir, a compressed air motor, a hollow shaft receiving air from the motor, said shaft ex-' tending into the reservoir, a rotary valve head carried by the shaft within the reservoir and oppositely arranged check valves arranged in said head as and for the purpose set forth.

2. The combination with an air reservoir, of a compressed air motor, said motor having a shaft provided with a slotted sleeve at its inner end, said sleeve receiving the compressed air, a stationary sleeve also slotted extending into the sleeve of the shaft, a hollow shaft fitting in the stationary sleeve, a hollow shaft section mounted on the hollow shaft last mentioned and extending into the compressed air reservoir, and a rotary valve head carried by the last mentioned shaft section.

8. A compressed air motor of the kind described comprising a casing, a shaft having a hollow portion journaled in the casing, oppositely arranged cylinders mounted on and rotatable with the shaft, valve controlled pistons in said cylinders a fixed gear ring,

pinions loosely traveling upon said ring, crescent-shaped plates holding said pinions in place, pins carried by the pinions and secured to the pistons, said pins working in slots formed in the cylinders, a fixed-sleeve extending into the sleeve of the shaft, both sleeves being slotted and having intermittent communication with the cylinders, and means for conveying compressed air from the last mentioned sleeve to an air reservoir.

SMEDLEY J. EVERTS. JOSEPH E. BURRIS.

Witnesses HENRY MORROW, PETER WEST. 

